The neutralization occurs when \( 10 \, \text{mL} \) of \( 0.1 \, \text{M} \) acid ‘\( A \)’ allowed to react with \( 30 \, \text{mL} \) of \( 0.05 \, \text{M} \) base \( \mathrm{M(OH)_2} \). The basicity of the acid ‘\( A \)’ is ______________.
[\( \mathrm{M} \) is a metal]
